Bulg. J. Phys. vol.44 no.4 (2017), pp. 498-508

j-1 Anomaly through the Silver Isotopic Chain

Abstract. The silver nuclei are placed in the verge between the classical shell model
and collective nuclear regions. As such, properties often attributed to one
or another mode are observed to co-exist at low excitation energies. Of particular
interest is the competition between the π g9/2-3 configuration and the
core excitations, which has been challenging for a number of theoretical models
to describe.
This work presents a systematical study of low-lying excited states in the
silver nuclei. A correlation between the (j,j-1) energy gap and the core's
2+ level energy is observed, which seems to be coherent, to certain extent,
with both the particle-core coupling and the shell model approaches.